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GALVANIG BATTERYI Patented JuneZ-, 1888.`

Morin e UNITED STATES PATENT OFFICE.

CHARLES A. BROWN AND MARTIN M..CLARK, OF CHICAGO, ILLINOIS, AS- SIGNORSTO THE VESTERNgELECTRIC' COMPANY, OF SAME PLACE.

GALVANIC BATTERY.

SPECIFICATION forming part of Letters Patent No. 384,958, dated June 26,1888.

Application filed February 1, 1888. Serial No. 262,614. (No model.)

To all whom t may concern:

Be it .known that we, CHARLEs A. BROWN and MARTIN M. CLARK, citizens ofthe United States, residing at Chicago, in the county of Cook and Stateof Illinois, have invented a certain new and useful Improvement inGalvanic Batteries, (Case 1,) of which the following is a full, clear,concise, and exact description, reference being had to the accompanyingdrawings, forming a part of this specification.

Our invention relates to galvanic batteries, and its object is toprovide a cheap and eiiicient means of holding the depolarizing compoundor mixture against the carbon element. Heretofore peroxide of manganeseand carbon have been mixed together and held against the carbon plate bya porous cup, the porous cup being contained in ajar containing asolution of sal-ammoniac, in which is inserted the zinc rod forming thepositive element. In other batteries ofthis class bricks composed ofsuitable depolarizing agents have been held against the negative elementby rubber bands. These batteries are known, respectively, in the tradeas Leclanch batteries, the former being spoken ofas the porous-cup77battery and the latter as the fprism77 battery.

The object of our invention is to cheapen the manufacture of this classof batteries, and by its use the porous cup is dispensed with, as alsothe necessity of forming the depolarizing compound into solid blocks orbricks.

Our invention consists, speaking generally, in substituting for thebricks a depolarizing mixture consisting, preferably, of equal parts ofperoxide of manganese and carbon,this mixture being contained in bagswhich are tied to opposite sides of the carbon element. These bags aremade preferably of canvas, and after being filled are tied up, the upperportion thereof being waxed.

Our invention is illustrated in the accompanying drawings, in whichiFigure l is a detailed view, partially in ver-` tical section, of a cellof battery embodying our invention. Fig. 2is a horizontal sectional viewthereof` on line :v x of Fig. 1.

- a is the usual glass jar, provided with the ordinary cover, b.

c is the zinc rod.

d is the ordinary negative carbon element. The bags ef, containing thedepolarizing compound, are held against the carbon element on oppositesides, by cords g h, as shown. When immersed in the solution, the cordsshrink, thus tending to hold the bags more firmly against the negativeelement. The upper portions of the bags are waxed, as indicated `at t,for the purpose ot' preventing the creeping of the solution to the topof the bags and thence to the cover of the jar and the connectingpost onthe carbon. The jar contains a solution of sal-ammoniac to such a heightas to l preferably only partially cover the bags.

Having thus described our invention, we claim as new and desire tosecure by Letters Patenti The combination, with the negative element ofa galvanie battery, of two bags containing a mixture of carbon andperoxide of 1nanga nese, said bags being secured to opposite sides ofsaid negative element, substantially as described.

Inwitness whereof we hereunto subscribe our names this 17th day ofJanuary,A.D. 1888.

CHARLES A. BROWN.

MARTIN M. CLARK.

Witnesses: CHAs. C. WooDWoETH GEORGE P. BARTON.

